Abstract:
A method of producing a semiconducting device is provided that in one embodiment includes providing a semiconducting device including a gate structure atop a substrate, the gate structure including a dual gate conductor including an upper gate conductor and a lower gate conductor, wherein at least the lower gate conductor includes a silicon containing material; removing the upper gate conductor selective to the lower gate conductor; depositing a metal on at least the lower gate conductor; and producing a silicide from the metal and the lower gate conductor. In another embodiment, the inventive method includes a metal as the lower gate conductor.
Abstract:
An anisotropic wet etch of a semiconductor layer generates facets joined by a ridge running along the center of a pattern in a dielectric hardmask layer on the semiconductor layer. The dielectric hardmask layer is removed and a conformal masking material layer is deposited. Angled ion implantation of Ge, B, Ga, In, As, P, Sb, or inert atoms is performed parallel to each of the two facets joined by the ridge causing damage to implanted portions of the masking material layer, which are removed selective to undamaged portions of the masking material layer along the ridge and having a constant width. The semiconductor layer and a dielectric oxide layer underneath are etched selective to the remaining portions of the dielectric nitride. Employing remaining portions of the dielectric oxide layer as an etch mask, the gate conductor layer is patterned to form gate conductor lines having a constant width.
Abstract:
A deep trench (DT) capacitor comprises a trench in a silicon layer, a buried plate surrounding the trench, a dielectric layer lining the trench, and a node conductor in the trench. The top surface of the poly node is higher than the surface of the silicon layer, so that it is high enough to ensure that a nitride liner used as a CMP etch stop for STI oxide surrounding a top portion of the poly node will be higher than the STI oxide, so that the nitride liner can be removed prior to forming a silicide contact on top of the poly node.
Abstract:
A method is provided for producing a fin structure on a semiconductor substrate using a thin SiGe layer to produce a void between a silicon substrate and a silicon fin portion. A fin structure produced by such a method is also provided.
Abstract:
A method for fabricating a semiconductor structure uses a volumetric change ion implanted into a volumetric change portion of a gate electrode that is located over a channel region within a semiconductor substrate to form a volume changed portion of the gate electrode located over the channel region within the semiconductor substrate. The volume changed portion of the gate electrode is typically bidirectionally symmetrically graded in a vertical direction. The volume-changed portion of the gate electrode has a first stress that induces a second stress different than the first stress into the channel region of the semiconductor substrate.
Abstract:
A pair of semiconductor structures and a method for fabricating a semiconductor structure each utilize a semiconductor substrate having a first crystallographic orientation, and a dielectric layer located thereupon. The method provides for epitaxially growing a semiconductor layer on the semiconductor substrate to encapsulate the dielectric layer. The method also provides for patterning the semiconductor layer to yield a semiconductor structure that comprises a bulk semiconductor structure and a semiconductor-on-insulator structure, or alternatively a patterned semiconductor layer that straddles the dielectric layer and contacts the semiconductor substrate.
Abstract:
Channel depth in a field effect transistor is limited by an intra-layer structure including a discontinuous film or layer formed within a layer or substrate of semiconductor material. Channel depth can thus be controlled much in the manner of SOI or UT-SOI technology but with less expensive substrates and greater flexibility of channel depth control while avoiding floating body effects characteristic of SOI technology. The profile or cross-sectional shape of the discontinuous film may be controlled to an ogee or staircase shape to improve short channel effects and reduce source/drain and extension resistance without increase of capacitance. Materials for the discontinuous film may also be chosen to impose stress on the transistor channel from within the substrate or layer and provide increased levels of such stress to increase carrier mobility. Carrier mobility may be increased in combination with other meritorious effects.
Abstract:
The embodiments of the invention comprise a self-aligned super stressed p-type field effect transistor (PFET). More specifically, a field effect transistor comprises a channel region comprising N-doped material and a gate above the channel region. The field effect transistor also includes a source region on a first side of the channel region and a drain region on a second side of the channel region opposite the first side. The source and drain regions each comprise silicon germanium, wherein the silicon germanium has structural indicia of epitaxial growth.
Abstract:
The present invention comprises a method for forming a semiconducting device including the steps of providing a layered structure including a substrate, a low diffusivity layer of a first-conductivity dopant; and a channel layer; forming a gate stack atop a protected surface of the channel layer; etching the layered structure selective to the gate stack to expose a surface of the substrate, where a remaining portion of the low diffusivity layer provides a retrograded island substantially aligned to the gate stack having a first dopant concentration to reduce short-channel effects without increasing leakage; growing a Si-containing material atop the recessed surface of the substrate; and doping the Si-containing material with a second-conductivity dopant at a second dopant concentration. The low diffusivity layer may be Si1-x-yGexZy, where Z can be carbon (C), xenon (Xe), germanium (Ge), krypton (Kr), argon (Ar), nitrogen (N), or combinations thereof.
Abstract:
A field effect transistor (FET) device includes a gate conductor formed over a semiconductor substrate, a source region having a source extension that overlaps and extends under the gate conductor, and a drain region having a drain extension that overlaps and extends under the gate conductor only at selected locations along the width of the gate conductor.